 What is open-source technology and why is it an important aspect of the tech ecosystem today? Okay, so definition. Open-source software is code that can be used, copied or modified by anybody. So this is part of an open culture. So the idea that says that anything you produce can be better if more people are able to collaborate on it. And open culture covers a whole range of things, including software as an open source, but also data hardware, and there are some other areas I've completely forgotten what they are. But it doesn't have to be a small thing. Open-source software, we have Linux, Android, Python, Ruby, Apache, they're all open-source. But at the heart of every single open project is this idea of community, idea of groups of people who care about your code and to help to make it better. So open-source doesn't mean free, doesn't mean everybody can do what they want with it. There are some limits to it. For instance, you can't sell open-source code. And if you distribute open-source code from somebody else that you've modified, you have to distribute it using exactly the same licenses as original code. So that's a rough idea of what open-source is. But this today is about disaster projects, so if you're looking for open-source disaster projects, the good place to start on that is HFOS, Humanitarian Free and Open-source Software.